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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2008-08-02 10:55:55 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-08-02 21:32:35 +0100
commit4baa9922430662431231ac637adedddbb0cfb2d7 (patch)
treee8fb765ce3e41c01f33de34a0bc9494f0ae19818 /arch/arm/include/asm/domain.h
parentff4db0a043a5dee7180bdffd178e61cd02812c68 (diff)
[ARM] move include/asm-arm to arch/arm/include/asm
Move platform independent header files to arch/arm/include/asm, leaving those in asm/arch* and asm/plat* alone. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/domain.h')
-rw-r--r--arch/arm/include/asm/domain.h78
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/arm/include/asm/domain.h b/arch/arm/include/asm/domain.h
new file mode 100644
index 00000000000..cc7ef408071
--- /dev/null
+++ b/arch/arm/include/asm/domain.h
@@ -0,0 +1,78 @@
+/*
+ * arch/arm/include/asm/domain.h
+ *
+ * Copyright (C) 1999 Russell King.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __ASM_PROC_DOMAIN_H
+#define __ASM_PROC_DOMAIN_H
+
+/*
+ * Domain numbers
+ *
+ * DOMAIN_IO - domain 2 includes all IO only
+ * DOMAIN_USER - domain 1 includes all user memory only
+ * DOMAIN_KERNEL - domain 0 includes all kernel memory only
+ *
+ * The domain numbering depends on whether we support 36 physical
+ * address for I/O or not. Addresses above the 32 bit boundary can
+ * only be mapped using supersections and supersections can only
+ * be set for domain 0. We could just default to DOMAIN_IO as zero,
+ * but there may be systems with supersection support and no 36-bit
+ * addressing. In such cases, we want to map system memory with
+ * supersections to reduce TLB misses and footprint.
+ *
+ * 36-bit addressing and supersections are only available on
+ * CPUs based on ARMv6+ or the Intel XSC3 core.
+ */
+#ifndef CONFIG_IO_36
+#define DOMAIN_KERNEL 0
+#define DOMAIN_TABLE 0
+#define DOMAIN_USER 1
+#define DOMAIN_IO 2
+#else
+#define DOMAIN_KERNEL 2
+#define DOMAIN_TABLE 2
+#define DOMAIN_USER 1
+#define DOMAIN_IO 0
+#endif
+
+/*
+ * Domain types
+ */
+#define DOMAIN_NOACCESS 0
+#define DOMAIN_CLIENT 1
+#define DOMAIN_MANAGER 3
+
+#define domain_val(dom,type) ((type) << (2*(dom)))
+
+#ifndef __ASSEMBLY__
+
+#ifdef CONFIG_MMU
+#define set_domain(x) \
+ do { \
+ __asm__ __volatile__( \
+ "mcr p15, 0, %0, c3, c0 @ set domain" \
+ : : "r" (x)); \
+ isb(); \
+ } while (0)
+
+#define modify_domain(dom,type) \
+ do { \
+ struct thread_info *thread = current_thread_info(); \
+ unsigned int domain = thread->cpu_domain; \
+ domain &= ~domain_val(dom, DOMAIN_MANAGER); \
+ thread->cpu_domain = domain | domain_val(dom, type); \
+ set_domain(thread->cpu_domain); \
+ } while (0)
+
+#else
+#define set_domain(x) do { } while (0)
+#define modify_domain(dom,type) do { } while (0)
+#endif
+
+#endif
+#endif /* !__ASSEMBLY__ */